“Can you hear me now?” “Is this you?” “Are you there?” If you’re asked a question like this in a normal conversation, it’s polite to let the other person know that you hear them loud and clear. But if you’re asked this at the beginning of a call from a random phone number, you should be wary. That’s because these questions are the signs of a fast-growing scam, according to a n ew alert from the Better Business Bureau , a nonprofit that tracks bad advertisements and customer complaints in North